Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (5): 663-667.DOI: 10.12068/j.issn.1005-3026.2016.05.012

• Materials & Metallurgy • Previous Articles     Next Articles

Numerical Simulation Research on Heat Transfer in Particle Flow Round Tubes

YU Qing-bo, PENG Jia-yan, REN Hui-lai, LIU Jun-xiang   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2015-04-07 Revised:2015-04-07 Online:2016-05-15 Published:2016-05-13
  • Contact: YU Qing-bo
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Abstract: At present, air is a commonly-used heat transfer medium to recover waste heat of slag particles in blast furnace (BF) after dry granulation, which has a low thermal efficiency owing to its low specific heat capacity. Therefore, using gravity bed waste heat boiler to recover waste heat in the high temperature BF slag particles was proposed. Considering the particles as continuous viscous flow, a three dimensional numerical model was built to simulate the heat transfer of BF slag particles flowing around tubes based on the CFD software of Fluent. The effects of the inlet velocity of particles and water, and the inlet temperature of water on the efficiency of heat exchanging in waste heat boiler were investigated. The simulation results show that the efficiency of heat transfer improves with increasing the inlet velocity of particles and water, and the heat recovery rate of the former drops. However, when the inlet temperature of water increases, the heat transfer coefficient keeps invariant and the heat recovery rate reduces.

Key words: particle flow, round tube, heat transfer, gravity bed waste heat boiler, numerical simulation

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